If you enable Javascript, you can get nifty, interactive graphs!
Otherwise, you're stuck with this old version that just shows an outdated, static png.

How many times are words, names or functions found in the Linux kernel source code? Browse an example or write your own comma-separated list to find out! You can use * for wildcards, foo|bar for sums, and a word is defined as \<[[:alnum:]_]+\> (ignoring case, considering accents).